Description of novel species of , and using a polyphasic approach.

Five cyanobacterial strains with -like morphology from different localities of the Mazandaran province of Iran were characterized using a polyphasic approach. Three strains clustered within the clade whereas one each of the remaining two strains clustered within the genera and . The phylogenetic positioning of all the strains by the bayesian inference, neighbour joining and maximum parsimony methods inferred using 16S rRNA gene indicated them to represent novel species of the genera , and .

A study on the antioxidant and antimicrobial activities in the chloroformic and methanolic extracts of 6 important medicinal plants collected from North of Iran.

Background: As possible sources of natural bioactive molecules, the plant essential oils and extracts have been used globally in new antimicrobial compounds, food preservatives, and alternatives to treat infectious disease.

Methods: In this research, the antimicrobial activities of chloroformic and methanolic extracts of , , , , , and were evaluated against 8 bacteria (, , , , , , , ) and 3 fungi (, and ), through disc diffusion method. Furthermore, the essential oils of plants with the highest antibacterial activity were analyzed utilizing GC/MS.

Effect of light/dark cycle on nitrate and phosphate removal from synthetic wastewater based on BG11 medium by sp.

In this study, microalgae growth in the synthetic wastewater and their ability to remove nutrients under different light levels was investigated. For this purpose, a comparative study was conducted on freshwater microalgae sp. to evaluate their performance to remove nitrate and phosphate from both slaughterhouse and dairy synthetic treated wastewaters, under different light/dark cycles (12/12, 16/8 and 24/0 h), in Erlenmeyer flasks.

Magnetic nano fluids for isolation of genomic DNA and total RNA from various prokaryote and eukaryote cells.

The correct isolation of nucleic acid from various cells is an important preliminary step before many biochemical and diagnostic processes such as cloning, sequencing, replication, hybridization, and complementary DNA (cDNA) synthesis. In this study, the coated magnetic nanoparticles (MNFs) with Tween 20 and oleic acid because of paramagnetic and bio-compatibility properties used in the extractions of genomic DNA (gDNA) and total RNA from prokaryote and eukaryote cells. The amount and accuracy of gDNA and total RNA extracted were proved via agarose gel electrophoresis, digestion and polymerase chain reaction (PCR) techniques.

Chemical Composition, Antioxidant and Biological Activities of the Essential Oil and Extract of the Seeds of Glycine max (Soybean) from North Iran.

Glycine max (L.) Merrill (soybean) is a major leguminous crop, cultivated globally as well as in Iran. This study examines the chemical composition of soybean essential oil, and evaluates the antioxidant and antimicrobial activities of seeds on various plant pathogens that commonly cause irreparable damages to agricultural crops.

Phytochemical screening and antimicrobial activities of the constituents isolated from Koelreuteria paniculata leaves.

Methanolic extract of Golden rain leaves was fractionated by column chromatography on silica gel and 18 fractions were obtained. Antimicrobial activities of fractions were investigated against Bacillus subtilis, Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa as quality control bacteria and fungus Pyricularia grisea which causes Blast disease in rice. Fractions showed more antibacterial activity at 0.

Quantitative gene expression analysis of some sodium ion transporters under salinity stress in Aeluropus littoralis.

Plant sodium transporters activity is one of the most important salt tolerance mechanisms to keep normal status of cytosolic sodium content. In the present study, expression pattern of genes encoding Na(+)/H(+) antiporters in the plasma membrane (SOS1 gene), vacuolar membrane (NHX1 gene) and H(+)-ATPase pump (VHA gene) in Aeluropus littoralis under different treatments of NaCl was measured by the semi-quantitative RT-PCR method. Our results indicated that root and shoot sodium contents were increased along with increasing salinity pressure.

Phosphate solubilization potential and modeling of stress tolerance of rhizobacteria from rice paddy soil in northern Iran.

The purposes of this study were to evaluate the phosphate solubilization activity of bacteria isolated from the rhizosphere of rice paddy soil in northern Iran, and to study the effect of temperature, NaCl and pH on the growth of these isolates by modeling. Three of the most effective strains from a total of 300 isolates were identified and a phylogenetic analysis was carried out by 16S rDNA sequencing. The isolates were identified as Pantoea ananatis (M36), Rahnella aquatilis (M100) and Enterobacter sp.

Evaluation of Bt (Bacillus thuringiensis) rice varieties against stem borer (Chilo suppressalis).

Three transgenic rice varieties namely Khazar, Neda and Nemat, all containing a cry1Ab gene, were evaluated through PCR analysis and field examinations for their resistance at natural infestation of insect pests during 2007. The results showed that all transgenic varieties produced 1.2 kb PCR product derived from application of cry1Ab gene.

Agronomic and quality characteristics of high-yielding rice lines.

This study is a part of rice cultivar development program in north of Iran with the aim of yield potential increase and attention to eating quality. Thirteen lines developed from the crosses between high yielding cultivars with aromatic low yield ones based on pedigree breeding method. These lines along with two controls (Neda and Sang-e-Tarom) were evaluated for agronomic and quality traits in a randomized complete block design during 2005.